The most difficult Mars riddles A list of Mars related questions that are most often answered incorrectly Astronomy quiz How long is stellar year on Mars?687 Earth days. The Martian year is almost twice longer than Earth's year.very hard 29% 687 Earth days687 Earth days29%423 Earth days423 Earth days16%183 Earth days183 Earth days17%121 Earth days121 Earth days35%Created by: Tschuka. Statistics based on 2066 answers in 3 languages »planets riddles » Which rover was the first to explore Mars?Sojourner was the first Mars rover. It was much smaller then Curiosity, whose wheel is about the size of the whole Sojourner. It landed on July 4, 1997 as part of Mars Pathfinder mission on Mars's Ares Vallis and remainded in contact with Earth till September 27, 1997.very hard 31% CuriosityCuriosity31%OpportunityOpportunity19%SojournerSojourner31%SpiritSpirit17%Created by: smyru. Statistics based on 4715 answers in 3 languages »space riddles » What was the first probe that successfully landed on Mars?Viking 1 was the first of two spacecraft (along with Viking 2) sent to Mars as part of NASA's Viking program. On July 20, 1976, it became the first spacecraft to land successfully on Mars and perform its mission. Viking 1 held the record for the longest Mars surface mission of 2307 days until that record was broken by Opportunity on May 19, 2010.very hard 37% CuriosityCuriosity23%Viking 1Viking 137%Pionner 10Pionner 1023%Luna 1Luna 114%Created by: Tschuka. Statistics based on 5696 answers in 3 languages »astronautics riddles » How long is the solar day on Mars?24 hours, 39 minutes, and 35.244 seconds. The solar day on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds.very hard 39% 24 hours, 39 minutes, and 35.244 seconds24 hours, 39 minutes, and 35.244 seconds39%44 hours, 12 minutes, and 35.244 seconds44 hours, 12 minutes, and 35.244 seconds37%62 hours, 18 minutes, and 35.244 seconds62 hours, 18 minutes, and 35.244 seconds14%86 hours, 54 minutes, and 35.244 seconds86 hours, 54 minutes, and 35.244 seconds7%Created by: 1partiiNieDadzaSkonczyc. Statistics based on 3410 answers in 3 languages »Solar System riddles » How many moons does Mars have? 2. Mars is the fourth planet from the sun. Mars has two Moons, Phobos and Deimos. They were both discovered in 1877, by Asaph Hall at the Naval Observatory in Washington DC. hard 52% 117%2252%3311%Mars has no moonsMars has no moons28%Created by: Tschuka. Statistics based on 4319 answers in 3 languages »astronomy riddles » Mars colonisation is a hype topic. What is the biggest threat for those wishing to take a part in a journey to Mars?Cosmic rays. The only efficient protection against high energetic cosmic radiation, one we are granted with, is Earth magnetic field. Both during a long flight to Mars and through the stay on the planet, that did not form electromagnetic field, astronauts would be exposed to ionization. hard 53% low temperatureslow temperatures9%lack of oxygenlack of oxygen28%poor gravitypoor gravity7%cosmic rayscosmic rays53%Created by: smyru. Statistics based on 19001 answers in 2 languages »physics riddles » Olympus Mons is the largest known volcano. Where is it?On Mars. Olympus Mons (Latin for Mount Olympus) is a large shield volcano on the planet Mars, having a height of nearly 22 km (14 mi). Being a shield volcano, it has a very low profile. The average slope on the volcano's flanks is only 5°. Because of that, an observer standing on the Martian surface would be unable to view the entire profile of the volcano, even from a great distance.average 62% in Australiain Australia5%in Indonesiain Indonesia12%in Antarcticain Antarctica19%on Marson Mars62%Created by: Trương Ngọc Hùng. Statistics based on 22494 answers in 5 languages »volcanoes riddles » Play astronomy quiz and see all the questions.